| 摘要 |
<p>The lock includes a locking and unlocking bar (18) engageable with a steering shaft (10). A hanger member (19) is movable in unison with the bar (18) and a spring (20) urges the hanger member (19) and the bar (18) together towards a locking position in engagement with the shaft (10). A rotator (21) is kept in cooperating contact with the hanger member (19) and is rotatable between a first and a second posrtion corresponding to the locking position and the unlocking position of the bar (18). The rotator (21) is formed with a sector cam (29) which has a rounded apex (30) adapted for establishing sliding contact with the hanger member (19) during the shaft-locking operation and an arc (33) adapted for establishing sliding contact with the hanger member (19) during the shaft-unlocking operation. Further, the sector cam (29) has a sector angle ( alpha ), measured at the apex (30) thereof from 15 to 150 DEG , most preferably about 90 degrees.</p> |
